INES Mapper 159: Difference between revisions
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(→Registers: what's the distinction between the X24C01 and 24C01? elucidate.) |
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=Registers= | =Registers= | ||
All registers function the same way as [[INES Mapper 016]], submapper 5, except that the serial EEPROM is not a 24C02 but | All registers function the same way as [[INES Mapper 016]], submapper 5, except that the serial EEPROM is not a 24C02 but Xicor's X24C01. This EEPROM has operational differences compared to both the larger 24C02 and other vendors' 24C01. Bandai's developers consistently thought the X24C01 was a little-endian device, and their code clocks in address and data bytes assuming this. However, it's actually a big-endian device, and a multi-byte read or write from EEPROM will increment the address accordingly. | ||
Latest revision as of 00:11, 10 May 2020
iNES Mapper 159 is used for Bandai FCG boards with an LZ93D50 ASIC and a 128-byte serial EEPROM (X24C01). The 128 bytes must be denoted as PRG-NVRAM in the NES 2.0 header using byte value $10.
Game List
- Dragon Ball Z: Kyoushuu! Saiya-jin
- Magical Taruruuto-kun: Fantastic World!!
- Magical Taruruuto-kun 2: Mahou Daibouken
- SD Gundam Gaiden - Knight Gundam Monogatari
Banks
- CPU $8000-$BFFF: 16 KiB switchable PRG ROM bank
- CPU $C000-$FFFF: 16 KiB PRG ROM bank, fixed to the last bank
- PPU $0000-$03FF: 1 KiB switchable CHR ROM bank
- PPU $0400-$07FF: 1 KiB switchable CHR ROM bank
- PPU $0800-$0BFF: 1 KiB switchable CHR ROM bank
- PPU $0C00-$0FFF: 1 KiB switchable CHR ROM bank
- PPU $1000-$13FF: 1 KiB switchable CHR ROM bank
- PPU $1400-$17FF: 1 KiB switchable CHR ROM bank
- PPU $1800-$1BFF: 1 KiB switchable CHR ROM bank
- PPU $1C00-$1FFF: 1 KiB switchable CHR ROM bank
Registers
All registers function the same way as INES Mapper 016, submapper 5, except that the serial EEPROM is not a 24C02 but Xicor's X24C01. This EEPROM has operational differences compared to both the larger 24C02 and other vendors' 24C01. Bandai's developers consistently thought the X24C01 was a little-endian device, and their code clocks in address and data bytes assuming this. However, it's actually a big-endian device, and a multi-byte read or write from EEPROM will increment the address accordingly.
